Whatever the evolutionary basis of religion, the xenophobia it now generates is clearly maladaptive.

It really is the most poetic thing I know about physics: you are all stardust.

The root cause of the looming energy problem - and the key to easing environmental, economic and religious tensions while improving public health - is to address the unending, and unequal, growth of the human population. And the one proven way to reduce fertility rates is to empower young women by educating them.

The ultimate arbiter of truth is experiment, not the comfort one derives from one's a priori beliefs, nor the beauty or elegance one ascribes to one's theoretical models.

[The writers of the holy books] did not even know the earth revolves around the sun. Why are we listening?

At the heart of quantum mechanics is a rule that sometimes governs politicians or CEOs-as long as no one is watching, anything goes.

Aside from communications satellites, space is devoid of industry.